Polygon zkEVM: The future of Ethereum scaling has made the code open source.
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Ethereum Scaling Solutions

Ethereum transparent scalability with L2 zk-Rollup

Polygon zkEVM is the first open-source zk-Rollup providing complete EVM opcode equivalence for a frictionless user experience and the security of Ethereum.
Overview

Ethereum Scalability and zk-Rollups

A zk-Rollup is a layer 2 construction on top of Ethereum that solves its scalability through mass transfer processing rolled into a single transaction. The "zero-knowledge proof" (ZK) technology is used to present and publicly record the validity and correctness of the rolled transfers processed on the Ethereum blockchain. By storing just the proof and the compressed data of a batch of transfers, the efficiency and the throughput of the network is multiplied.

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Scaling without user friction

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    Developers can run their existing Ethereum smart contracts
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    Permissionless access and use of the network
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    EVM equivalence means tooling compatibility
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    Fast network finality with frequent validity proofs
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    Fees reduction of 90% with on-chain data

No Compromises

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    All EVM opcodes will be supported
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    Ethereum security inherited in L2
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    Censorship Resistance is enforced
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    Decentralised by protocol design

Open Source, Cutting Edge ZK Tech

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    Extendable EVM processor with a new zk-assembly language
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    Use of Polygon Zero technology, the fastest ZK proof in the world
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    Recursive STARK for extreme scalability
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    zkSNARK footprint size in L1 for user cost optimization
ARCHITECTURE

Layer 2 scalability solution

zkEVM zk-Rollup is a layer 2 construction on top of Ethereum that solves its scalability through mass transfer processing rolled into a single transaction.
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Frequently Asked Questions

  • What is Polygon zkEVM?
      Polygon zkEVM is the first zero-knowledge (ZK) scaling solution that’s fully compatible with Ethereum: all existing smart contracts, developer tools, and wallets work seamlessly. The zkEVM harnesses the power of ZK proofs to reduce transaction cost and massively increase throughput, all while inheriting the security of Ethereum L1.
  • What is available today?
      The first step toward the zkEVM is the announcement and open-sourcing the code. This is a major step because Polygon zkEVM will be the first fully open source ZK L2 that supports smart contracts, but it’s only the beginning.
  • When will Polygon zkEVM Testnet be available?
      Polygon zkEVM Testnet will be available in Q3 2022.
  • When will Polygon zkEVM Mainnet be available?
      Polygon zkEVM Mainnet will be available in early 2023.
  • What are the main features of Polygon zkEVM?
      Below are the some of the features of Polygon zkEVM
      • Ethereum-equivalence: all smart contracts, wallets, tools, etc work on zkEVM seamlessly.
      • Ethereum security
      • ZKP-powered scalability, orders of magnitude higher throughput than L1.
  • What are the main benefits of Polygon zkEVM?

      Polygon zkEVM is a Layer Two (L2) scaling solution for Ethereum that leverages the scaling power of zero-knowledge (ZK) proofs while maintaining Ethereum-compatibility. Developers and users on Polygon zkEVM can use the same code, tooling, apps, etc that they use on Ethereum, but with much higher throughput and lower fees.

      Developers will deploy their existing contracts to the zkEVM, and users can deposit assets from Ethereum and transact off-chain. These transactions are grouped into batches with a zero-knowledge proof proving the validity of each transaction. This ensures that the operators of the zkEVM can’t steal user funds, so we can say that it inherits the security of Ethereum L1. Polygon zkEVM offers compatibility and scalability without compromise.

  • What are the Unique value propositions of Polygon zkEVM?

      Unique Value Propositions: EVM-equivalent and Performance

      EVM-equivalent: Ethereum isn’t just a blockchain. It’s a rich ecosystem of smart contracts, developer tools, infrastructure, and wallets. It’s a vibrant community of developers, auditors, and users. The best way to scale Ethereum is to maintain compatibility with this ecosystem, and the zkEVM will give users and developers an identical experience to Ethereum L1 -- just with a massive scalability improvement.

      Performance: Many people in crypto believed that a zkEVM was years away, and might never be practical or competitive with other ZK L2s. This was framed as an unavoidable tradeoff: we could have full EVM compatibility or high performance, but not both. However, with the proving system breakthroughs pioneered by Polygon Zero, we can achieve full EVM compatibility while offering better performance (higher throughput, lower latency, and lower cost) than alt-L1s, optimistic rollups, and other ZK rollups.

  • What are some of the main use cases for Polygon zkEVM?

      Defi Applications: Because of Polygon zkEVM’s high security and censorship resistance nature of it, it is a good fit for Defi applications. Unlike Optimistic Roll-ups where users have to wait for upto 7 days for deposits and withdrawals, zk-Rollups doesn’t have to wait for long periods for deposits and withdrawals i.e Polygon zkEVM offers better capital efficiency for dApps/users.

      NFT, Gamefi and Enterprise applications: Low gas cost, high transactions and greater level of security coupled with Ethereum composability attracts blue chip NFTs, Gamefi and Enterprise applications.

      Payments: Users interested in transacting with each other in real-time within a near-instantaneous and low fee environment will appreciate the value Polygon zkEVM provides.

  • Is Polygon zkEVM Open source?
      Yes.
  • Does Polygon zkEVM supports Solidity?
      Yes.
  • What types of dApps can be deployed in zkEVM?
      Any dApp that is compatible with EVM can be deployed.
  • How does zkEVM fares compare to competitors?

      Compatibility: The most well-known ZK scaling projects promise EVM compatibility but run a different VM architecture that requires developers to transpile or migrate code, breaking existing developer tooling and infrastructure. This is a disadvantage, because it means that they'll need to build a new ecosystem of developer tools and infrastructure from scratch.

      The Ethereum developer ecosystem is the result of a huge investment of time and energy, and preserving compatibility with it is a major selling point for the zkEVM. We're not just scaling transactions per second on Ethereum, we're also building on the foundation of a vibrant community and ecosystem.

      Performance: It's difficult to provide performance comparisons as benchmarks aren't public or don't exist yet. However, we anticipate that the Polygon zkEVM prover is the fastest one, being able to validate 500K gas units on a single CPU server (64 cores) in about 5 minutes time.
      Polygon was the first to implement recursive STARKs, a core building block in ZK L2s, almost a year ahead of other teams. We've seen huge ~100x improvements in the most expensive operations in the zkEVM: keccak, ECDSA, and recursion, over the previous state of the art. Enabling recursion, zkEVM has a clear path to improve ZK proof times and scalability.

      Security and Ethereum-alignment vs alt-L1s: Using ZK allows a ZK L2 to inherit the security of Ethereum. ZK proofs ensure that every transaction on the zkEVM is valid. This ensures that it's impossible for operators of the L2 to steal funds from users. Security (as well as scalability) is a major benefit for the zkEVM relative to alt-L1s, and it ensures that the zkEVM is closely aligned with Ethereum, still by far the dominant chain in terms of developer activity, TVL, NFT activity, etc.

  • Does Polygon zkEVM has a separate token?
      No. ETH will be used for gas fees.MATIC will be used for staking, governance in Polygon zkEVM.
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